/*包含班级管理和试卷管理导航栏*/
body{
    overflow-x: hidden;
}
.nav-class {
    width: 100%;
    display: block;
    font-size: 15px;
}
.nav-class li{
    width: 33.33%;
    text-align: center;
}
.nav-question {
    width: 100%;
    display: block;
    font-size: 15px;
}
.nav-question li {
    width: 50%;
    text-align: center;
}
#title{
    width: 100%;
    height: 250px;
    position: relative;
}
#title img{
    width: 100%;
    height: 250px;
    position: absolute;
    z-index: -999;
}
#dropdown{
    position: absolute;
    font-size:20px;
    /*border: 1px red solid;*/
    right: 30px;
    top: 10px;
}
.dropdown-toggle,.dropdown-toggle:link{
    color: white;
    text-decoration: none;
}
.dropdown-toggle:hover{
    color: white;
}
.classInfo{
    width: 100%;
    height: 100%;
    opacity: 0;
    padding-top: 50px;
    color: white;
    opacity: 0;
    -webkit-transition: 2s ease-out;
    -moz-transition: 2s ease-out;
    -ms-transition: 2s ease-out;
    -o-transition: 2s ease-out;
    transition: 2s ease-out;
}
/*标题栏的放大动画效果*/
.classInfo h1,.classInfo p{
    margin: 10px auto;
    text-align: center;
    /*width: 700px;*/
    -webkit-transition: 1s ease-out;
    -moz-transition: 1s ease-out;
    -ms-transition: 1s ease-out;
    -o-transition: 1s ease-out;
    transition: 1s ease-out;
}
.classInfo h1:hover,.classInfo p:hover{
    -webkit-transform: scale(1.2,1.2);
    -moz-transform: scale(1.2,1.2);
    -ms-transform: scale(1.2,1.2);
    -o-transform: scale(1.2,1.2);
    transform: scale(1.2,1.2);
}